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João Matos

About the author

LinkedIn
Soon after getting his Bachelor's degree in Computer Engineering, João Matos joined the GadgetGram team on May 2019. Since then, he has been working as the Content Director, with the main goal of publishing thorough reviews on all sorts of newly released tech-products. In addition, João has also been been working as a senior news writer and news editor at Gadget Gram, as well as the Director of Social Media.

Blogs

GUNNAR Optiks Tindra – Reading Glasses with Blue Light Protection

GUNNAR Optiks Tindra – Reading Glasses with Blue Light Protection

by | Jul 2, 2026 | , ,

The GUNNAR Optiks Tindra are computer reading glasses for women that feature a full-rim rectangular design crafted from premium engineered polymer. They also feature GUNNAR’s patented lens technology, which effectively blocks harmful blue light and 100% UV rays, and GUNNAR’s proprietary G-Shield lens coating, which makes them anti-reflective and smudge-resistant. Designed for focused workdays and gaming, these sleek reading glasses are ideal for everything digital, from morning journaling and late-night e-reading to working on your computer and long gaming sessions.

LUMISTAR TERO – AI-Powered Tennis Ball Machine

LUMISTAR TERO – AI-Powered Tennis Ball Machine

by | Jun 30, 2026 |

The LUMISTAR TERO is an AI-powered tennis ball machine that uses AI adaptation technology to adapt to your shots in real-time with 0.1-second response, adjusting ball speed, placement, and spin based on how you’re playing. The machine can shoot tennis balls at a speed of 12-87 mph (20-140 km/h) with a spin of ±3,600 RPM across a 85.3 ft. (26 m) range. It integrates an anti-jam system, low-noise serving, and has a self-cleaning airflow function that helps prevents motor clogs. The machine boasts up to 4 hours of battery life. It offers 252 drills via the LUMISTAR app for pro-level training, including 34 preset drills with 7 difficulty levels, plus 2 AI modes. It also supports voice commands through its smart wristband for uninterrupted practice. Designed to eliminate the monotony of practicing against standard machines, this advanced AI tennis ball machine turns solo practice sessions into something resembling actual match conditions.

JOYROOM JR-TRD01 PODIX – 140W 5-Port Desktop GaN Charger

JOYROOM JR-TRD01 PODIX – 140W 5-Port Desktop GaN Charger

by | Jun 25, 2026 |

The JOYROOM JR-TRD01 PODIX is a powerful desktop charger that features a 180° rotatable design, built-in dual retractable USB-C cables, and a tri-magnet base that provides a secure grip. It’s powered by next-gen GaN technology, allowing it to charge up to 5 devices simultaneously with a 140W total output. The charger features 5 charging ports, including one 140W USB-C and two 100W USB-C ports, plus two 30W USB-A ports. It also integrates a 1.54″ LCD display that shows real-time output power and boasts 8-layer safety protection. Designed to keep all your essential devices powered, this desktop charger makes for a great all-in-one charging solution for both home and office use.